Efficient photoelectric Fenton treatment device
By combining photo-Fenton and electro-Fenton technologies, staggered electrodes and ultraviolet lamps promote the decomposition of H2O2 and the conversion of Fe3+, optimize the mass transfer process, and solve the problems of low efficiency and high iron sludge production of existing electro-Fenton technology in the treatment of high-concentration organic wastewater, achieving efficient degradation and low-energy consumption treatment.
Patent Information
- Application Number
- CN202422440963.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The existing electro-Fenton technology is limited by factors such as pH, H2O2 concentration, and Fe2+ concentration when treating high-concentration organic wastewater. It also has poor mass transfer and incomplete reaction, resulting in low reaction efficiency and high iron sludge production.
Combining photo-Fenton technology with electro-Fenton technology, it adopts staggered iron anodes and stainless steel cathodes, uses ultraviolet lamps to promote the decomposition of H2O2 and the conversion of Fe3+, optimizes the mass transfer process through circulating water devices and aeration devices, increases the generation of oxidative free radicals, and uses acrylic reflective materials to improve the photo-Fenton efficiency.
It achieves efficient treatment of high-concentration organic wastewater at low energy consumption, reduces iron sludge production, improves reaction efficiency, enhances mass transfer process, and improves organic matter degradation effect.
Smart Images
Figure CN223357437U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-efficiency photoelectric Fenton treatment device, belonging to the technical field of water treatment. Background Art
[0002] In recent years, with the continuous development of industrial technology, the discharge volume of organic wastewater has continued to increase, and the composition of the emissions has become increasingly complex, including some difficult-to-degrade organic pollutants. Advanced oxidation treatment technologies have shown significant effectiveness in treating organic wastewater. The hydroxyl radicals (•OH) produced in this process have strong oxidative power, capable of degrading most large organic compounds that are difficult to remove by conventional methods. This, in turn, triggers a chain oxidation reaction with the help of intermediate products, ultimately producing harmless substances such as H2O and CO2.
[0003] Among the advanced oxidation technologies, electro-Fenton technology is considered to be one of the most promising technologies. Under the action of electric field, electro-Fenton technology converts O2 in aeration into H2O2 at the cathode. H2O2 reacts with Fe 2+ The reaction produces hydroxyl radicals (•OH). Multiple sets of anodes and cathodes can greatly increase the production of hydroxyl radicals (•OH), thereby improving the removal rate of macromolecular organic compounds in organic wastewater.
[0004] However, the single electro-Fenton technology is affected by pH, H2O2 concentration, Fe 2+ In order to further improve the removal efficiency of organic matter due to the limitation of factors such as concentration, the electro-Fenton technology is combined with the photo-Fenton technology. The two technologies work together to achieve better results. The ultraviolet light in the photo-Fenton can react with Fe 2+ It can synergistically promote the decomposition of H2O2, more efficiently generate hydroxyl radicals (•OH), and promote the removal of macromolecular organic compounds in organic wastewater. At the same time, ultraviolet light can promote the removal of Fe 3+ Fe 2+ Transformation to achieve continuous system response. Summary of the Invention
[0005] The technical problem to be solved by the utility model is to provide a high-efficiency photoelectric Fenton treatment device, which can treat high-concentration organic wastewater with low energy consumption, maintain a high dissolved oxygen concentration on the electrode surface with a low aeration volume, and also play a certain stirring role. An ultraviolet lamp is added to facilitate the decomposition of H2O2 and Fe 3+ Fe 2+ conversion, improve reaction efficiency and reduce iron sludge production.
[0006] In order to solve the above problems, the specific technical solutions of the present invention are as follows: a high-efficiency photoelectric Fenton treatment device, comprising a circulating water device, an aeration device, an electrode device and a photoelectric Fenton reaction device; wherein the photoelectric Fenton reaction device is composed of a plurality of flange columns vertically coaxially connected in sequence, and each adjacent flange column is connected by a flange plate, and an iron anode or a stainless steel cathode is sealed and pressed between the fitted flange plates, and the iron anode and the stainless steel cathode are staggered and respectively connected to the electrode device; the inlet of the circulating water device is connected to the bottom of the photoelectric Fenton reaction device, and the outlet of the circulating water device is connected to the top of the photoelectric Fenton reaction device; a volume cavity is provided at the bottom of the flange column located at the bottom, and the volume cavity is connected to the aeration device; an opening is provided at the top of the flange column located at the top, and an ultraviolet lamp is provided at the opening.
[0007] The iron anode is made of iron and has a plurality of through holes on its surface; the stainless steel cathode is made of stainless steel wrapped with carbon nanomaterials and has a mesh structure on its surface.
[0008] The entire wall panel of the volume cavity is made of acrylic, and its bottom surface is set as a reflective material.
[0009] The circulating water device includes an inlet pipe, an outlet pipe and a regulating tank. The water supply port of the regulating tank is connected to the water pump through a first valve; the outlet of the regulating tank is connected to the volume cavity through the inlet pipe; the outlet pipe is connected to the flange columns located at the top and several located in the middle, and the outlet pipes are aggregated and divided into two branch pipes. One branch pipe is connected to the outside through a third valve, and the other branch pipe is connected to the water inlet of the regulating tank through a fourth valve.
[0010] The aeration device includes an air compression pump and a second valve; wherein the air compression pump is connected to the volume chamber through the second valve.
[0011] The electrode device includes a DC power supply, a cathode control switch and an anode control switch. The negative electrode of the DC power supply is connected in parallel to the stainless steel cathode through the cathode control switch, and the positive electrode of the DC power supply is connected in parallel to the iron anode through the anode control switch.
[0012] A drain valve is provided at the bottom of the volume chamber.
[0013] The high-efficiency photoelectric Fenton treatment device of the present application adopts the above structure and has the following advantages:
[0014] 1. This application sets a UV lamp on the top of the photoelectric Fenton reaction device to facilitate the decomposition of H2O2 and Fe 3+ Fe 2+ The photoelectric Fenton cell shell is made of acrylic and has a reflective plate at the bottom. This design can improve the photo-Fenton efficiency of the UV lamp.
[0015] 2. The water inlet pipe is at the bottom and the water outlet pipe is at the top, which enhances convection and promotes the mass transfer process. When the sewage flows through the inside of the electrode, there is sufficient contact between the strong oxidizing free radicals and the pollutant molecules, which improves the reaction efficiency and degradation effect.
[0016] 3. The electrode sheets of the present application can be freely assembled. The appropriate number of electrode groups can be selected according to the different pollutant concentrations and target water quality requirements to improve the degradation rate and degradation effect. At the same time, the device is easy to disassemble and convenient for regular cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Schematic diagram of the structure of a high-efficiency photoelectric Fenton treatment device.
[0018] Figure 2 Schematic diagram of the iron anode in the flange column.
[0019] Figure 3 Schematic diagram of the stainless steel cathode in the flange column. DETAILED DESCRIPTION
[0020] like Figures 1 to 3 As shown, a high-efficiency photoelectric Fenton treatment device includes a circulating water device, an aeration device, an electrode device and a photoelectric Fenton reaction device; the photoelectric Fenton reaction device is composed of a plurality of flange columns 1 connected vertically and coaxially in sequence, each adjacent flange column 1 is connected by a flange plate, and an iron anode 4 or a stainless steel cathode 5 is sealed and pressed between the fitted flange plates, and the iron anode 4 and the stainless steel cathode 5 are staggered and respectively connected to the electrode device; the inlet of the circulating water device is connected to the bottom of the photoelectric Fenton reaction device, and the outlet of the circulating water device is connected to the top of the photoelectric Fenton reaction device; a volume chamber 2 is provided at the bottom of the flange column 1 located at the bottom, and the volume chamber 2 is connected to the aeration device; an opening is provided at the top of the flange column 1 located at the top, and an ultraviolet lamp 3 is provided at the opening. The ultraviolet lamp is fixed to the upper end of the photoelectric Fenton tank by a retractable bracket and extends into the reactor through the retractable bracket when in use.
[0021] The iron anode 4 is made of iron and has a plurality of through-holes on its surface; the stainless steel cathode 5 is made of stainless steel coated with carbon nanomaterials and has a mesh structure on its surface. This embodiment uses two sets of staggered iron anodes 4 and stainless steel cathodes 5; the electrode device includes a DC power supply 31, a cathode control switch 32, and an anode control switch 33. The negative pole of the DC power supply 31 is connected in parallel to the stainless steel cathode 5 via the cathode control switch 32, and the positive pole of the DC power supply 31 is connected in parallel to the iron anode 4 via the anode control switch 33. Workers can control the operation of one set of iron anodes 4 and stainless steel cathodes 5 or two sets of iron anodes 4 and stainless steel cathodes 5 simultaneously according to the sewage flow rate, thereby improving work efficiency.
[0022] In order to improve the reflective effect, the entire wall panel of the volume cavity 2 is made of acrylic, and its bottom surface is set to reflective material.
[0023] The circulating water device includes an inlet pipe 12, an outlet pipe 13, and a regulating tank 11. The water inlet of the regulating tank 11 is connected to a water pump 14 via a first valve 15. The outlet of the regulating tank 11 is connected to the volume chamber 2 via the inlet pipe 12. The outlet pipe 13 is connected to the flange columns 1 at the top and several in the middle. The outlet pipe 13 is then combined and divided into two branch pipes. One branch pipe is connected to the outside through a third valve 16, and the other branch pipe is connected to the water inlet of the regulating tank 11 through a fourth valve 17. A drain valve 18 is provided at the bottom of the volume chamber 2, which can be opened during non-operating hours to drain wastewater. The aeration device includes an air compressor pump 21 and a second valve 22. The air compressor pump 21 is connected to the volume chamber 2 via the second valve 22. The opening and closing of the first valve 15, the second valve 22, the third valve 16, or the fourth valve 17 by an external control mechanism achieves timed and quantitative control of water inflow, outflow, or aeration, thereby completing the overall photoelectric Fenton treatment control process.
[0024] The working process of the photoelectric Fenton treatment device of the present application is as follows: the wastewater flows through the regulating tank 11, which is conducive to the subsequent photoelectric Fenton reaction. The wastewater enters from the volume chamber 2 on the lower side of the photoelectric Fenton tank. According to the different wastewater concentrations, the number of iron anodes 4 and stainless steel cathodes 5 to be installed is selected, and the independent cathode control switch 32 and anode control switch 33 are adjusted. This can not only efficiently treat the wastewater, but also overcome the problems of poor mass transfer and insufficient reaction in the existing Fenton system to a certain extent. The inlet of the aeration pipe is located directly below the electrode, and the air can directly react with O2+2H on the surface of the energized stainless steel cathode 5. + +2e - →H2O2 generates H2O2, which reduces the amount of oxygen dissolved in water, effectively increases the yield of hydrogen peroxide, and at the same time plays a certain role in flushing impurities generated on the electrode surface. In addition, it also plays a certain stirring role in the entire reaction system. The ultraviolet lamp 3 is fixed on the upper part of the photoelectric Fenton cell. The position of the ultraviolet lamp 5 in the photoelectric Fenton cell 1 can be flexibly adjusted according to actual conditions. The ultraviolet light can react with Fe
[0025] 2+ It can synergistically promote the decomposition of H2O2, more efficiently generate hydroxyl radicals (•OH), and promote the removal of macromolecular organic compounds in organic wastewater. At the same time, ultraviolet light can promote the removal of Fe 3+ Fe 2+The system achieves continuous reaction by converting the wastewater. If the wastewater treated by the photoelectric Fenton treatment device meets the discharge standard, the third valve 16 is opened, the fourth valve 17 is closed, and the wastewater is discharged through the outlet pipe 13. If the wastewater does not meet the discharge standard, the third valve 16 is closed, the fourth valve 17 is opened, and the wastewater enters the regulating tank 11 through the inlet pipe 12 for the next cycle. After the reaction is complete, the drain valve 18 is opened to discharge the remaining wastewater in the photoelectric Fenton cell.
Claims
1. A high-efficiency photoelectric Fenton treatment device, characterized by: The invention comprises a circulating water device, an aeration device, an electrode device and a photoelectric Fenton reaction device; wherein the photoelectric Fenton reaction device is composed of a plurality of flange columns (1) connected in sequence vertically and coaxially, each adjacent flange column (1) is connected via a flange plate, an iron anode (4) or a stainless steel cathode (5) is sealed and pressed between the fitted flange plates, and the iron anode (4) and the stainless steel cathode (5) are staggered and respectively connected to the electrode device; the inlet of the circulating water device is connected to the bottom of the photoelectric Fenton reaction device, and the outlet of the circulating water device is connected to the top of the photoelectric Fenton reaction device; a volume chamber (2) is provided at the bottom of the flange column (1) at the bottom, and the volume chamber (2) is connected to the aeration device; an opening is provided at the top of the flange column (1) at the top, and an ultraviolet lamp (3) is provided at the opening.
2. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: The iron anode (4) is made of iron and has a plurality of through holes on its surface; the stainless steel cathode (5) is made of stainless steel wrapped with carbon nanomaterials and has a mesh structure on its surface.
3. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: The overall wall panel of the volume cavity (2) is made of acrylic, and its bottom surface is provided with a reflective material.
4. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: The circulating water device comprises a water inlet pipe (12), a water outlet pipe (13) and a regulating tank (11); the water supply port of the regulating tank (11) is connected to the water pump (14) through a first valve (15); the water outlet of the regulating tank (11) is connected to the volume chamber (2) through the water inlet pipe (12); the water outlet pipe (13) is connected to the flange columns (1) located at the top and several flange columns (1) located in the middle, and the water outlet pipe (13) is combined and divided into two branch pipes, one branch pipe is connected to the outside through a third valve (16), and the other branch pipe is connected to the water inlet of the regulating tank (11) through a fourth valve (17).
5. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: The aeration device comprises an air compression pump (21) and a second valve (22); wherein the air compression pump (21) is connected to the volume chamber (2) via the second valve (22).
6. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: The electrode device comprises a DC power supply (31), a cathode control switch (32) and an anode control switch (33), wherein the negative electrode of the DC power supply (31) is connected in parallel to the stainless steel cathode (5) via the cathode control switch (32), and the positive electrode of the DC power supply (31) is connected in parallel to the iron anode (4) via the anode control switch (33).
7. The high-efficiency photoelectric Fenton treatment device according to claim 1, characterized in that: A drain valve (18) is provided at the bottom of the volume chamber (2).